In all my years working out of Carbon River (Mt. Rainier National Park), I never thought to visit this confluence even though I was aware of its existence. Of course, those were the days before GPSrs were available to the general public, and somehow standing with a compass in your hand at the presumed point where imaginary lines intersect provides no particular gratification, unlike doing the Zero Waltz as you attempt to bring visual readings into round figures. Thus it was that as dusk crept in, I spent ten minutes or more stepping sideways, backwards and forwards until my cherished Garmin Summit HC grabbed hold of signal long enough to snapshot the backlit screen. Satellite acquisition was quite variable due to a dense canopy.
As others have mentioned, this is an easy confluence to attain. Parking may be had by pulling off the side of a quiet paved road. A light trail laid down by geocachers leads through thinned reproduction forest ("reprod" in the vernacular) to an area where several old but impressive rotten logs are strewn on the ground. A few stumps in various stages of decay are in evidence, but there is very little understory...few ferns, no salal or blackberries, and surprisingly, very little moss for as dark as the section remains during the day.
I'd like to thank my geocaching partner Frisbee'r for bringing me on this dual mission. Although he had found the geocache at this location during a previous visit, he agreed to accompany me to the confluence site in the interest of documenting it for the Degree Confluence Project. I got so excited by the potential zeroes that initially, I forgot we had a cache to find!